Remove dependency on play-guice

[berryware]

scaldi-play currently requires that the guice module be loaded to use it. This never felt right to me. It appears to be required because of a reference to com.google.inject.CreationException. In looking at the catch block, there is no need for this reference.

I propose that the catch block in ScaldiBuilder.scala be changed to

    } catch {
      case p: PlayException => throw p
      case t: Throwable => t.getCause match {
        case pe: PlayException => throw pe
        case _ => throw t
      }
    }

I will submit a pull request for the above